About KD-X444SP
Key Digital® KD-X444SP is a 4K/UHD 18Gbps, HDCP2.2 compliant HDMI over CAT5e/6 Transmitter plus
Receiver set for extension of digital video signals with the latest standards in resolution, HDR, and Chroma
over a single CAT cable.
KD-X444SP extends video resolutions up to 4096x2160 at 60hz with 4:4:4 chroma sub-sampling over a
single CAT5e/6 cable up to 164ft (50m).
In addition to HDMI AV, KD-X444SP carries IR or RS-232 for controlling remotely located equipment. An IR
sensor and IR emitter are included, and the Tx unit’s IR Input port supports Serial IR input directly from a
control system / IR block. With Power over CAT (PoC), only one power supply is needed, and it may be
connected at either unit for ease of installation.
KD-X444SP features Key Digital’s proprietary Full Buffer Technology software suite, with EDID handshake
management, fixed hot plug detection, HDCP authentication to the connected source, and TMDS signal re-
clocking for installation with long cabling or many connectivity layers.
Key Features
•Single CAT5e/6 UTP/STP Extension: Fully automatic equalization, and amplification depending on
cabling length.
•4K Resolution Support: 4096x2160 or 3840x2160 24/25/30/60hz at 4:4:4 (signals up to 18Gbps
bandwidth).
•Flexible Power over CAT (PoC): Only one power connection needed. Tx may power Rx, or Rx may
power Tx.
•Visually Lossless Compression: 18G enabling technology applied to all video formats exceeding
10.2Gbps to accommodate transmission channel.
•Low Profile: Super slim chassis design.
•Signal Extension via CAT5e/6:
o4K/UHD (18G) and 1080p: Up to 164ft / 50m
•10G Pass-thru: Mode enables uncompressed 10.2Gbps signal extension.
•HDR10 (High Dynamic Range): More life-like images through a greater range of luminance.
•HDCP 2.2: Compliancy up to HDCP 2.x and backward compliant
•Deep Color Support: Up to UHD/4K 30Hz 4:4:4/12 bits or 60Hz 4:4:4/8 bit
•IR Sensor: Sensor powering via +5V on IR In ports collects line-of-sight IR from remote(s) without
external IR connecting block.
•Up/Down IR: Two channels of IR enable control to/from devices or control systems connected to Tx and
Rx units.
